Improvement in piston-springs



man saut @anni dimite Letters Patent No. 93,273, dated August 3, 1869.

IMPROVEMENT IN PISTON-SPRING-S.

The Schedule referred to in these Letters Patent and making cart of thesame.

T o all whom it may concern lthe piston of a steam-engine.

Similar letters of reference indicate like parts in all the figures.

lhe principal object ofmy invention is to provide a series of springs,to be used with the commonlyused divided packing-rings of a steam-enginepiston,

said ringstoV be easy of construction, and etlicient when in place.

This object I accomplish by constructing my improved springs of twoseparate pieces of at bar or ribbon-steel, the form of which is shown infigs. l, 2, and 3.

The depth of the spring should be a little less than that of the spacethey are intended to occupy when in place, for if they should fit closeup to the follower, they could not work easily, and would, therefore, bemetiicient.

' Each spring is constructed of two pieces, separate and distinct fromeach other, the outer part, A, of the spring fitting against the insideof divided inner ring F, as shown in iig. 3, and the innerhalf, B, ofthe spring fitting against the hub C of the piston,-as

shown in the same figure.

' Each halfof the spring A and' has a small central semicireula-r curve,seen at c and d in the accompany'- ing drawings, and the outer ends ofthe springs are curved, as shown ata a and l) b, in rigs. 1,2, and 3.

The points a (t of the halt' A ofthe spring are curved, in order thatthey may work easily against the inside of inner divided ring F, and theouter ends'lof the inner half B of the spring are curved, as shown inthe drawings, in order to prevent them from sliding or overlapping eachother, and also, that they may work easily against hub C of the piston.

Springs constructed of two pieces of steel, as above shown anddescribed, maybe easily formed by almost any ordinary workman, andtempered in an oil-bath without any difficulty whatever. rlhey will workfreely when in place. They will not fracture or break, as do thosesprings that are made of one piece of steel, nor are they as difiicultto temper They can be given a more uniform temper, and thus theirelasticity will be found to be greater than if they had been formed ofone Apie-ee of steel.

Springs constructed as herein described will be much more durable andreliable than in the old style of constructing them of one piece ofsteel.

Another great advantage possessed by my springs is their uniformpressure upon all parts of the circum ference of the piston-packingrings F and G.

'lhe position of the severa-l ports of a steam-engine piston are shownin tig. 3, in which E designates the piston-rod, I) the hub, and O arebate, turned down 'off the hub, to receive the follower, which issecured in place by nuts or bolts K K K.

'lhe follower is made inthe usual and well-known manner, and a littlesmaller than the outside rings G.

Having described my invent-ion,

What I claim-as new. and desire to secure by Letters Patent, is

The construction of a piston-spring, consisting of two parts, A and B,made of flat bar or ribbon-steel, substantially in the manner and forthe purpose as herein shown and described.

- WILLIAM R. BROWN.

iiitnesses S. S. `J onus, THOMAS HASTING.

